/*
 * Copyright (c) 2016 Zibin Zheng <znbin@qq.com>
 * All rights reserved
 */

#ifndef _MULTI_BUTTON_H_
#define _MULTI_BUTTON_H_

#include <stdint.h>
#include <string.h>

// According to your need to modify the constants.
#define TICKS_INTERVAL 5 // ms
#define DEBOUNCE_TICKS 3 // MAX 7 (0 ~ 7)
#define SHORT_TICKS (300 / TICKS_INTERVAL)
#define LONG_TICKS (5000 / TICKS_INTERVAL)
#define LONG_TICKS_FAST (500 / TICKS_INTERVAL) // 补丁，不是标准的，为了实现，长按快速加减功能，不加会有调整数字长按5秒后才能实现快速加减

typedef void (*BtnCallback)(void *);

typedef enum
{
	PRESS_DOWN = 0,
	PRESS_UP,
	PRESS_REPEAT,
	SINGLE_CLICK,
	DOUBLE_CLICK,
	LONG_PRESS_START,
	LONG_PRESS_HOLD,
	number_of_event,
	NONE_PRESS
} PressEvent;

typedef struct Button
{
	uint16_t ticks;
	uint8_t repeat : 4;
	uint8_t event : 4;
	uint8_t state : 3;
	uint8_t debounce_cnt : 3;
	uint8_t active_level : 1;
	uint8_t button_level : 1;
	uint8_t button_id;
	uint8_t (*hal_button_Level)(uint8_t button_id_);
	BtnCallback cb[number_of_event];
	struct Button *next;
} Button;

#ifdef __cplusplus
extern "C"
{
#endif

	void button_init(struct Button *handle, uint8_t (*pin_level)(uint8_t), uint8_t active_level, uint8_t button_id);
	void button_attach(struct Button *handle, PressEvent event, BtnCallback cb);
	PressEvent get_button_event(struct Button *handle);
	int button_start(struct Button *handle);
	void button_stop(struct Button *handle);
	void button_ticks(void);

#ifdef __cplusplus
}
#endif

#endif
